BMP280 Digital Barometric Pressure and Altitude Sensor – High-Precision I2C/SPI Module for Weather Stations & Drones

Product Description The BMP280 is an absolute barometric pressure sensor specifically designed for mobile applications where size and power consumption are critical. As the upgraded successor to the BMP180, this module offers significantly higher precision, lower noise, and a dual-communication interface (I2C and SPI). It is capable of measuring pressure with an accuracy that allows for altitude calculations within ±1 meter, making it a vital component for drone flight stabilization, indoor navigation, and localized weather forecasting. The module also features an integrated high-linearity temperature sensor, providing calibrated environmental data for microcontrollers like ESP32, STM32, and Raspberry Pi.

Key Features

• Dual Interface Support: Features both I2C and SPI protocols, offering flexibility for different microcontroller architectures and bus speeds.

• Ultra-Low Power Consumption: Optimized for battery-powered devices, drawing only 2.7 µA during standard pressure measurements.

• High-Precision Altitude Sensing: Fine-tuned pressure sensing enables altitude detection with a resolution of 1 meter or less.

• Integrated Temperature Sensor: Provides factory-calibrated temperature data used for pressure compensation and ambient monitoring.

• Industrial Grade Reliability: Designed by Bosch Sensortec for long-term stability and high EMC robustness in varied climates.

Technical Details

• Piezo-Resistive Technology: Utilizes a highly sensitive MEMS element that detects minor changes in atmospheric weight.

• Pressure Resolution: Features a 20-bit resolution for pressure, ensuring granular data for precision engineering.

• Digital Filtering: Includes on-board IIR filtering to minimize the influence of short-term pressure fluctuations (e.g., wind gusts or door slams).

• Communication Speed: Supports I2C up to 3.4 MHz and SPI up to 10 MHz for high-frequency data logging.

• Internal Calibration: Every sensor is factory-calibrated; compensation coefficients are stored in the NVM (Non-Volatile Memory).

• Standby Modes: Features multiple power modes (Sleep, Normal, Forced) to balance update frequency against battery life.

• Low Noise Floor: Specifically engineered to have very low RMS noise (0.2 Pa), which is essential for stable altitude hold in drones.

• Absolute Accuracy: Maintains a high absolute accuracy of ±1.0 hPa over the full 0°C to +65°C range.

• Voltage Regulation: Most breakout boards include a 3.3V LDO; however, the core chip operates strictly at 1.8V to 3.6V.

• Pin Configuration: VCC, GND, SCL, SDA, CSB (SPI select), and SDO (Address select/MISO).

• Fast Startup: Ready to provide accurate data within 2 ms after power-up.

• Solder-Friendly PCB: High-quality gold-plated pads ensure reliable electrical connections even in high-vibration environments.

• Dynamic Range: Capable of tracking pressure changes from sea level up to 9,000 meters altitude.

• Long-Term Drift: Features excellent stability with a minimal aging drift of only ±1.0 hPa per year.

• Logic Level Compatibility: Note that while it can be powered by 3.3V, the SDA/SCL lines require 3.3V logic levels; use level shifters for 5V Arduino boards.